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* java/net/URLDecoder.java: Thanks Edgar Villanueva (edgarvil@home.com) (decode): Merge comments with Classpath, don't throw Exception From-SVN: r39030
84 lines
2.9 KiB
Java
84 lines
2.9 KiB
Java
/* URLDecoder.java -- Class to decode URL's from encoded form.
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Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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package java.net;
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import java.io.UnsupportedEncodingException;
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/**
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* This utility class contains one static method that converts a
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* string encoded in the x-www-form-urlencoded format to the original
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* text. The x-www-form-urlencoded format
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* replaces certain disallowed characters with
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* encoded equivalents. All upper case and lower case letters in the
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* US alphabet remain as is, the space character (' ') is replaced with
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* '+' sign, and all other characters are converted to a "%XX" format
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* where XX is the hexadecimal representation of that character. Note
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* that since unicode characters are 16 bits, and this method encodes only
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* 8 bits of information, the lower 8 bits of the character are used.
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* <p>
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* This method is very useful for decoding strings sent to CGI scripts
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*
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* Written using on-line Java Platform 1.2 API Specification.
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* Status: Believed complete and correct.
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*
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* @since 1.2
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*
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* @author Warren Levy <warrenl@cygnus.com>
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* @author Aaron M. Renn (arenn@urbanophile.com) (documentation comments)
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* @date April 22, 1999.
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*/
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public class URLDecoder
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{
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/**
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* This method translates the passed in string from x-www-form-urlencoded
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* format and returns it.
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*
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* @param source The String to convert
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*
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* @return The converted String
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*/
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public static String decode(String s)
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{
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String str = s.replace('+', ' ');
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String result = "";
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int i;
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int start = 0;
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while ((i = str.indexOf('%', start)) >= 0)
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{
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result = result + str.substring(start, i) +
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(char) Integer.parseInt(str.substring(i + 1, i + 3), 16);
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start = i + 3;
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}
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if (start < str.length())
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result = result + str.substring(start);
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return result;
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}
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} // class URLDecoder
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